EP0106918B1 - Procédé et appareil pour la réalisation d'extraits de couleur pour l'impression à couleurs distinctes - Google Patents

Procédé et appareil pour la réalisation d'extraits de couleur pour l'impression à couleurs distinctes Download PDF

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Publication number
EP0106918B1
EP0106918B1 EP82112002A EP82112002A EP0106918B1 EP 0106918 B1 EP0106918 B1 EP 0106918B1 EP 82112002 A EP82112002 A EP 82112002A EP 82112002 A EP82112002 A EP 82112002A EP 0106918 B1 EP0106918 B1 EP 0106918B1
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EP
European Patent Office
Prior art keywords
colour
separation
signal
signals
original
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82112002A
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German (de)
English (en)
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EP0106918A1 (fr
Inventor
Hans-Georg Knop
Michael Nowak
Friedrich Redecker
Ralf Tiede
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing Rudolf Hell GmbH
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Dr Ing Rudolf Hell GmbH
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Publication date
Application filed by Dr Ing Rudolf Hell GmbH filed Critical Dr Ing Rudolf Hell GmbH
Priority to AT82112002T priority Critical patent/ATE19696T1/de
Priority to IL6988083A priority patent/IL69880A/xx
Publication of EP0106918A1 publication Critical patent/EP0106918A1/fr
Application granted granted Critical
Publication of EP0106918B1 publication Critical patent/EP0106918B1/fr
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/54—Conversion of colour picture signals to a plurality of signals some of which represent particular mixed colours, e.g. for textile printing

Definitions

  • the invention relates to the field of electronic reproduction technology for single color printing and relates in particular to a method and a device for producing color separations.
  • single color printing z. B. understood the textile, decor or packaging printing.
  • each color to be printed is mixed before the printing process and then transferred separately to the printing medium, so that a corresponding color separation must be produced for each color of a template.
  • Such a template has, for example, color tones with a continuous color distribution, i. H. with a different color saturation and / or brightness within the individual colors.
  • the color separations must contain a statement about the local distribution of the individual colors as well as a statement about the color gradient, i. H. deliver on the locally different strength of the paint application.
  • a device for producing color separations for single-color printing is already known.
  • three primary color measurement signals are obtained, which represent the color components red, green and blue of the scanned pixels.
  • a brightness signal or, in the event that the gradient signal transmitter is a customary color calculator for multi-color mixed printing color separation signals are obtained from the color measurement signals.
  • Either the brightness signal or a color separation signal selected before recording is used as the recording signal for a color separation.
  • a color detection circuit to which the color measurement signals are applied is preset for the detection of the individual template colors in the sample. The color detection circuit supplies corresponding color detection signals when the preset original colors are recognized when the sample is scanned.
  • the selected recording signal is switched through to a writing lamp of the recording element S in dependence on the color detection signal of the relevant original color whenever the selected original color is recognized in the original pattern.
  • the writing lamp modulated in brightness by the recording signal, exposes a recording medium, e.g. B. a film that shows the desired color separation after development.
  • the individual color tone distributions appear sharply outlined in the associated color separations, so that the individual colors are printed exactly next to one another during later printing. Depending on the type of sample, this can be advantageous, but occasionally it can also lead to disturbing tears in the color gradient in the print.
  • the invention specified in claims 1 and 8 is therefore based on the object of specifying a method and a device for producing color separations for single-color printing, with which the reproduction of color gradients in particular is improved in the color separation.
  • the figure shows a device for producing color separations for individual color printing, for example for textile, decorative, porcelain or packaging printing.
  • a sample 2 is clamped on a rotating scanning drum 1 and is scanned point by point and line by line by a scanning element 3.
  • the scanning light coming from the template 2 reaches the scanning element 3 via objectives 4 and 5 and a diaphragm 6 and is broken down into three partial beams there by means of partially transparent mirrors 7 and 8.
  • the partial beams fall through color filters 9, 10 and 11 onto three optoelectronic converters 12, 13 and 14, which convert the received scanning light into three primary color measurement signals R, G and B as a measure of the color components red, green and blue of the scanned pixels.
  • the color measurement signals R. G and B are optionally logarithmized in a logarithmic stage 15 or partially logarithmic and a converter stage 16, z. B. in the form of a color space transformation stage, where it is converted into the color signals E i , E2 and E3, which represent the color space coordinates of the sampled colors.
  • a color detection circuit 17 To distinguish between the colors or color tones occurring in the template 2, hereinafter referred to as template colors, there is a color detection circuit 17 in which, before the sample 2 is scanned, color detection spaces for the individual template colors to be distinguished are delimited within the color space, the individual color detection spaces being as good as possible must be adapted to the color ranges of the original colors to be separated in order to achieve an exact color separation. While the sample 2 is being scanned, the color recognition circuit 17 checks which delimited color recognition spaces the color signals E i , E2 and E3 are to be assigned to and outputs corresponding ones Color detection signals A for the individual original colors.
  • the color recognition circuit 17 may z. B. be designed to distinguish sixteen original colors.
  • the color recognition signal A 1 appears when the original color is recognized as “white”
  • the color recognition signal A 3 when the original color is recognized as “reddish yellow”
  • the color recognition signal A 5 when the original color is recognized as “yellowish green”.
  • the color detection circuit 17 can be constructed according to DE-B-25 44 703 or DE-B-26 28 053. In this case, the color recognition spaces are delimited by electronically generated threshold signals for the color signals E 1 , E2 and E3. Alternatively, the color detection circuit 17 can be designed according to DE-A-29 23 468 or DE-A-29 23 473 or DE-A-29-23 477. In this case, the color recognition spaces are set up by entering color numbers in a color recognition memory which is addressed during color recognition by the color signals E 1 , E2 and E3, the color identification being carried out by outputting the corresponding color numbers.
  • the color measurement value signals R, G and B coming from the logarithm stage 15 are simultaneously fed to a correction circuit 18 for color and / or tone value corrections, in which the color measurement value signals R, G and B according to the laws of subtractive color mixing into the color separation signals "yellow (Y), «Magenta (M), « Cyan (C) and «Black (K) converted, modified and, if necessary, also mixed.
  • the correction circuit 18 can e.g. B. be a color calculator for multi-color mixed printing.
  • the color separation signals Y, M, C and K coming from the correction circuit 18 are switched through for recording in a multiple switching stage 19 as a function of control signals S 1 to S 4 and are first fed to a logic stage 20 in which the switched through color separation signals Y , M, C and K can optionally be weighted differently.
  • the individual switches 19a to 19d of the multiple switching stage 19 are symbolized by mechanical switches which can be actuated by the control signals S 1 to S 4 .
  • the multiple switching stage 19 is preferably an analog multiplexer.
  • the multiple switching stage 19 can also consist of multipliers, in which control signals and color separation signals are multiplicatively linked.
  • the color recognition signal A 1 to A 16 can be freely assigned to each control signal S 1 or S 2 , S 3 and S 4, at least one original color, so that the color separation signals Y or M, C and K are always switched through as the recording signal U when the assigned original colors are recognized when the sample 2 is scanned, thereby making at least two color separation signals or at least two original colors different from the conventional technique of recording a color separation involved.
  • the respective switched-through color separation signals Y or M, C and K pass through the linkage stage 20, a film linearization stage 22 and an output amplifier 23 to the writing lamp 24 of a recording element 25.
  • the exposed and developed film is one of the desired color separations or the printing form for single color printing.
  • the invention is not limited to the production of color separations or printing forms by film exposure, for example printing form engraving devices can also be used.
  • the reproduction device in particular with regard to the possible assignments of color detection signals A and color separation signals Y or M, C and K or control signals S in the assignment stage 21, is explained using an advantageous procedure.
  • the original color (separation color), the print density of which is to be recorded in full in the color separation, and one of the color separation signals Y or M, C and K (main signal), e.g. B. the one that best represents the color gradient of the separation color is selected and the control signal S for the main signal in question is assigned the color detection signal A of the selected separation color.
  • the main signal in question is additionally controlled by the “white” original color by also assigning the color detection signal A for the “white” original color to the control signal S of the main signal.
  • the color detection signal A 3 for the separation color” reddish yellow and the color detection signal A 1 for the original color "white will be assigned to the control signal S 4 for the switch 19a, since the color separation signal Y best represents the color gradient for «reddish yellow.
  • those original colors (secondary colors) are selected which are to appear in the color separation to be recorded with a reduced printing density and whose color separation signals Y or M, C and K in the correction circuit 18 with respect to the initial and final density, gradation and basic and selective color correction so corrected that they are in the color separation to be recorded regarding the color separation and the color gradient deliver an optimal result.
  • the color detection signals A of the selected secondary colors are assigned the control signals S of the relevant color separation signals Y or M, C and K, which determines which secondary colors are also advantageously involved in the recording of the color separation in addition to the separation color.
  • the color separation signal Y is switched by means of the switch 19a when the separation color “reddish yellow and the original color” woman and alternatively the color separation signal C is switched by the switch 19c when the secondary color "yellowish green occurs and at the Recording of the color separation «reddish yellow involved.
  • This advantageously improves the color gradient or the color transition at color area boundaries in such a way that the color area boundaries in a color separation are no longer recorded sharply, but rather overlapping.
  • the overlap creates a zone of mixed printing in which the mixed colors are no longer printed next to each other but on top of each other in single-color printing, which prevents annoying color breaks.
  • the selective correction of the secondary colors results in better color separation in the color separations.
  • each color separation signal Y or M, C or K is assigned a different original color or a different color detection signal A. Since, as mentioned above, only one color detection signal A occurs at any time, in the example described the recording signal U is only ever formed from the currently activated color separation signal Y or M, C, K.
  • the assignments of color separation signals Y or M, C, K and color detection signals are not limited to the procedure described, but can be freely selected.
  • a color separation signal Y or M, C, K the color detection signals A of several original colors or the color detection signal A of an original color simultaneously a plurality of color separation signals Y or M, C, K
  • the recording signal U is not formed from one of the color separation signals Y or M, C, K, but by an addition, in particular by a weighted addition of color separation signals Y or M, C, K.
  • the linkage works Stage 20 as an adder for the weighted color separation signals Y or M, C, K. It would also be conceivable to form the recording signal U by mixing the color separation signals Y or M, C, K by means of a balance controller controlled by the color detection signals A.
  • Multiple switching stage 19 then consists of multipliers, to which the color separation signals Y or M, C, K and the color detection signals A are fed ll must have the color detection circuit 17 analog color detection signals A, which have their maximum values at the preset focus colors within the color detection spaces and become zero at the boundaries of the color detection spaces.
  • Such a color detection circuit is, for. B. described in DE-B-26 28 053.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Color Image Communication Systems (AREA)

Claims (12)

1. Procédé pour réaliser des extraits de couleur notamment pour l'impression monochrome, selon lequel :
a) on détecte un modèle en couleur (2) pour obtenir des signaux de couleur (R, G, B) à l'aide d'un organe de détection (3) opto-électronique, de façon trichromatique, par point et par ligne.
b) à partir des signaux de couleur (R, G, B), on génère des signaux de reconnaissance de couleur (A) pour les différentes couleurs de modèles du modèle (2) et on forme des signaux d'extrait de couleur (Y, M, C, K) par une correction de couleur et/ou de valeur de teinte,
c) on commande un signal d'extrait de couleur (Y, M, C, K) par le signal de reconnaissance de couleur (A) d'une couleur de modèles choisie comme extrait de couleur,
d) on génère un signal d'inscription (U) pour un organe d'inscription (25) et,
e) par ce signal, on inscrit point par point et ligne par ligne l'extrait de couleur de la couleur d'extrait, caractérisé en ce que :
f) lors de l'inscription de l'extrait de couleur de la couleur d'extrait, on sélectionne au moins une autre couleur de modèle,
g) les signaux d'extrait de couleur (Y, M, C, K) sont corrigés de façon sélectivement limitée pour les couleurs de modèle choisies,
h) on commande au moins un signal d'extrait de couleur corrigé de façon sélective, choisi par le signal de reconnaissance de couleur (A) de l'autre couleur de modèle et
i) on forme le signal d'inscription (U) à partir des signaux d'extrait de couleur commandés par le signal de reconnaissance de couleur (A) de l'extrait de couleur et par le signal de reconnaissance de couleur (A) des signaux d'extrait de couleur corrigés de façon sélectivement commandée d'au moins une autre couleur de modèle.
2. Procédé selon la revendication 1, caractérisé en ce que les signaux de reconnaissance de couleur (A) des couleurs de modèle sélectionnées font passer comme signal d'inscription (U) vers l'organe d'inscription (25), les signaux d'extrait de couleur corrigés de façon sélective, lors de la reconnaissance des couleurs de modèle choisies dans le modèle (2).
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que :
a) on choisit comme couleur d'extrait pour un extrait de couleur celle des couleurs de modèle qui doit être inscrite dans l'extrait de couleur concerné avec la valeur de densité totale, et
b) le signal de reconnaissance de couleur (A) de la couleur d'extrait commande le signal d'extrait de couleur corrigé de façon sélective qui restitue le mieux le profil de couleur de la couleur d'extrait.
4. Procédé selon la revendication 3, caractérisé en ce que le signal d'extrait de couleur corrigé de façon sélective, qui reproduit le mieux le profil de couleur de la couleur d'extrait est en outre commandé par le signal de reconnaissance de couleur (A) de la couleur de modèle « blanc ".
5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que comme autres couleurs des modèles (couleurs auxiliaires) pour un extrait de couleur, on sélectionne les couleurs de modèle du modèle (2) qui sont à inscrire dans l'extrait de couleur avec une valeur de densité non totale.
6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que :
a) le signal de reconnaissance de couleur (A) d'une couleur de modèle, choisie, commande simultanément au moins deux signaux d'extrait de couleur corrigés de façon sélective et,
b) le signal d'inscription (U) s'obtient par addition des signaux d'extrait de couleur corrigés de façon sélectivement commandée.
7. Procédé selon la revendication 6, caractérisé en ce que le signal d'inscription (U) est formé par une addition pondérée des signaux d'extrait de couleur, corrigés de façon sélective, commandés.
8. Installation pour obtenir des extraits de couleur notamment pour l'impression monochrome, comprenant :
a) l'organe de détection (3) opto-électronique pour fournir des signaux de couleur (R, G, B) par détection trichromatique point par point et ligne par ligne d'un modèle (2),
b) un circuit de reconnaissance de couleur (17, 21) qui est relié à l'organe de détection (3) pour former des signaux de reconnaissance de couleur (A) pour les couleurs de modèle du modèle (2),
c) un circuit de correction (18) relié à l'organe de détection (3) pour former des signaux d'extrait de couleur (Y, M, C; K) à partir des signaux de couleur (R, G, B) par une correction de couleur et/ou de valeur de teinte.
d) un étage de commande (19a) dans le chemin du signal d'un signal d'extrait de couleur (Y, M, C, K) qui est relié à une sortie du circuit de correction (18) et à une sortie du circuit de reconnaissance de couleur (17, 21) pour commander le signal d'extrait de couleur en fonction du signal de reconnaissance de couleur
(A) d'une couleur de modèle sélectionnée comme couleur d'extrait et
e) un organe d'inscription (25) pour inscrire point par point et ligne par ligne un extrait de couleur, organe commandé par un signal d'inscription (U), caractérisé par :
f) un moyen pour corriger sélectivement le signal d'extrait de couleur dans le circuit de correction (18),
g) d'autres étages de commande (19b, 19c, 19d) dans les chemins de signaux des signaux d'extrait de couleur corrigés de façon sélective et qui sont reliés aux autres sorties du circuit de correction (18) et aux autres sorties du circuit de . reconnaissance de couleur (17, 21) pour commander au moins un autre signal d'extrait de couleur corrigé de façon sélective en fonction du signal de reconnaissance de couleur (A) d'au moins une autre couleur de modèle, et
h) un étage de combinaison (20) qui est relié aux sorties des étages de commande (19a, 19b, 19c, 19d) et à l'entrée de l'organe d'inscription (25) pour former le signal d'inscription (U) à partir des signaux d'extrait de couleur corrigés de façon sélective, commandés.
9. Installation selon la revendication 8, caractérisée en ce que les étages de commande (19a, 19b, 19c, 19d) sont réalisés sous forme de commutateurs.
10. Installation selon la revendication 8, caractérisée en ce que les étages de commande (19a, 19b, 19c, 19d) sont réalisés sous la forme de multiplicateurs.
11. Installation selon l'une des revendications 8 à 10, caractérisée en ce que l'étage de combinaison (20) est formé comme additionneur pour une addition pondérée des signaux d'extrait de couleur corrigés de façon sélective, commandés.
EP82112002A 1982-10-22 1982-12-24 Procédé et appareil pour la réalisation d'extraits de couleur pour l'impression à couleurs distinctes Expired EP0106918B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT82112002T ATE19696T1 (de) 1982-10-22 1982-12-24 Verfahren und einrichtung zur herstellung von farbauszuegen fuer den einzelfarbendruck.
IL6988083A IL69880A (en) 1982-10-22 1983-09-30 Method and apparatus for producing colour separations for solid colour printing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP82109759 1982-10-22
EP82109759 1982-10-22

Publications (2)

Publication Number Publication Date
EP0106918A1 EP0106918A1 (fr) 1984-05-02
EP0106918B1 true EP0106918B1 (fr) 1986-05-07

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EP82112002A Expired EP0106918B1 (fr) 1982-10-22 1982-12-24 Procédé et appareil pour la réalisation d'extraits de couleur pour l'impression à couleurs distinctes

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Country Link
US (1) US4564859A (fr)
EP (1) EP0106918B1 (fr)
JP (1) JPS59100442A (fr)
DE (1) DE3271077D1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE27865T1 (de) * 1983-12-14 1987-07-15 Hell Rudolf Dr Ing Gmbh Verfahren und einrichtung zur herstellung von farbauszuegen fuer den einzelfarbendruck.
JPS60245035A (ja) * 1984-05-18 1985-12-04 Ascii Corp デイスプレイコントロ−ラ
EP0191135B1 (fr) * 1985-02-09 1991-04-17 Dainippon Screen Mfg. Co., Ltd. Procédé et appareil pour la reproduction d'images séparées en couleurs par balayage
US4610536A (en) * 1985-05-06 1986-09-09 Polaroid Corporation Laser scanning and printing apparatus
US4670780A (en) * 1985-05-28 1987-06-02 Tektronix, Inc. Method of matching hardcopy colors to video display colors in which unreachable video display colors are converted into reachable hardcopy colors in a mixture-single-white (MSW) color space
JP2521691B2 (ja) * 1987-02-20 1996-08-07 株式会社東芝 画像形成装置
JPH0614688B2 (ja) * 1987-12-09 1994-02-23 大日本スクリーン製造株式会社 色分解画像走査記録装置を使用するカラー原画の単色複製方法
US4959790A (en) * 1988-06-28 1990-09-25 F & S Corporation Of Columbus, Georgia Apparatus and method for producing color corrected reproduction of colored original images
US4899214A (en) * 1988-09-02 1990-02-06 Itek Graphic Corp. Low cost color scanner
IL93607A (en) * 1990-03-02 1997-09-30 Scitex Corp Ltd Method and system for preparing polychromatic printing plates
US5841955A (en) * 1991-12-02 1998-11-24 Goss Graphic Systems, Inc. Control system for a printing press
US5767980A (en) * 1995-06-20 1998-06-16 Goss Graphic Systems, Inc. Video based color sensing device for a printing press control system
US5805280A (en) * 1995-09-28 1998-09-08 Goss Graphic Systems, Inc. Control system for a printing press

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053311B (de) * 1958-02-11 1959-03-19 Hell Rudolf Dr Ing Fa Verfahren und Vorrichtung zur elektronischen Farbkorrektur
US3555262A (en) * 1968-05-07 1971-01-12 Dainippon Screen Mfg Apparatus for production of color separation records
IT1057754B (it) * 1975-03-19 1982-03-30 Hell R Gmbh Procedimento e dispositivo per la riproduzione di immagini a mezza tinta con modifica della misura di scomposizione dei punti d immagine nel passaggio da modello a riproduzione
DE2526409C3 (de) * 1975-06-13 1979-08-09 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Eichung einer eine fotomechanische Druckform erzeugenden Aufzeichnungseinheit
DE2544703C3 (de) * 1975-10-07 1978-04-06 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren und Schaltungsanordnung zum Erkennen von Farben einer farbigen Fläche
DE2607623B2 (de) * 1976-02-25 1978-12-21 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Farbwertbeurteilungsgerät
DE2628053C2 (de) * 1976-06-23 1978-06-15 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Schaltungsanordnung zum Erkennen von Farben
CH646788A5 (de) * 1978-11-28 1984-12-14 Hell Rudolf Dr Ing Gmbh Verfahren und schaltungsanordnung zum erkennen von farben.
DE2923477C2 (de) * 1979-06-09 1984-01-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Schaltungsanordnung zum Erkennen von Farben
DE2923468C2 (de) * 1979-06-09 1984-01-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Schaltungsanordnung zum Erkennen von Farben
DE2853511C2 (de) * 1978-12-12 1981-11-19 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren und Vorrichtung zur Herstellung von Farbauszügen insbesondere für den Textildruck
DE2923472A1 (de) * 1979-06-09 1980-12-11 Bayer Ag Verfahren zur herstellung von aminen und katalysator zur durchfuehrung des verfahrens
BR8008858A (pt) * 1979-10-05 1981-08-25 Hell R Gmbh Processo para a transformacao de sinais digitais de crominancia de um sistema retangular de coordenadas cromaticas em sinais digitais de tonalidade e sinais de saturacao de um sistema polar de coordenadas cromaticas e conexao de transformacao

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Publication number Publication date
DE3271077D1 (en) 1986-06-12
EP0106918A1 (fr) 1984-05-02
US4564859A (en) 1986-01-14
JPH0513303B2 (fr) 1993-02-22
JPS59100442A (ja) 1984-06-09

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